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3807 Pagels (1981 SE1)
Classification: Main-belt Asteroid          SPK-ID: 2003807
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1677708002031974 1.909e-08  
a 2.253373338791036 6.0645e-09 au
q 1.875323090585513 4.2231e-08 au
i 4.298693383627418 1.1883e-06 deg
node 160.9215729798549 1.1855e-05 deg
peri 129.404429104493 1.852e-05 deg
M 274.4038876383057 8.7282e-06 deg
tp 2459494.264757962061
(2021-Oct-06.76475796)
3.0347e-05 TDB
period 1235.515375037866
3.38
4.9877e-06
1.366e-08
d
yr
n .2913763820939637 1.1763e-09 deg/d
Q 2.631423586996559 7.082e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3110  
   data-arc span      23842 days (65.28 yr)  
   first obs. used      1955-12-12  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42378  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:12:59  

Additional Information
 Earth MOID = .86081 au 
 Jupiter MOID = 2.54382 au 
 T_jup = 3.603 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.12   n/a MPCxxxxx  
diameter diameter 5.532 km 0.183 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.3 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.399   0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3807 Pagels (1981 SE1)          Discovered 1981-Sep-26 by Skiff, B. A. and Thomas, N. G. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 SE1 = 1974 QM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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